This year
Color Laboratory -- AWARE Center -- HTML Writers Guild
This color laboratory allows you to select colors and see how they appear next to one another, and in various foreground/background combinations. It also allows you to see those colors as they might appear to color-blind users.
Color equivalents table
The 147 color keywords defined in SVG, as referenced by the CSS Color Module Level 3, along with their various numeric equivalents.
2011
A Guide To Improve Your Website's Readability Through Colors
Colors have a huge effect on readability. This is why you need to choose them wisely so that they not only create esthetically pleasing combinations but also make it easier for users to read the text. Text is an integral part of any site and we shouldn’t punish visitors for coming to our site by using hard to read color combinations.
2010
Checking colour contrast – Humanising Technology
Proper Standards-Compliant Color Use in Web Design
2009


